In Richmond local residents are being asked to give their views in a referendum on night flights.
The borough's two MPs are united in their opposition to expansion and equally clear about night flights saying it is unfair on those living near the flight paths.
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The capital's theatres also generate more searches than those in any other city, according to research by Google.
Union officials are expected to meet next week to plan further stoppages if talks fail to resolve the dispute.
Natalie Sharp and Christine Bicknell appeared in court over an alleged incident at a Lidl superstore in Wallington, south London.